Finding the Third Proportional to 72,216 and 111,602

Step by Step Solution

1. Step 1: Write the proportion equation
   72,216 : 111,602 = 111,602 : x
2. Step 2: Convert to fraction form
   72,216/111,602 = 111,602/x
3. Step 3: Cross multiply
   72,216x = 111,602 × 111,602
4. Step 4: Simplify right side
   72,216x = 12,455,006,404
5. Step 5: Solve for x
   x = 12,455,006,404/72,216
6. Step 6: Final answer
   x = 172,468.79